Section 1 Overview

I. Definition of argon arc welding

Second, the characteristics of argon arc welding

Third, the working principle and classification of argon arc welding

Four, the types and characteristics of argon arc welding current

Section 2 Design and Form of Argon Arc Welding Groove

First, the general principles of groove design

Second, the welding joint form and welding position

Three, commonly used groove forms and processing methods

Section 3 Mechanical Properties and Heat Treatment of Metal Materials

I. Mechanical properties of metal materials

Second, the mechanical properties of metal test

Third, the basic knowledge of heat treatment

Chapter II Safety Knowledge and Labor Protection of Welders

The first section welder safety electricity and personal protection

First, use electricity safely.

Second, personal protection.

Third, the handling of electric shock accidents

Fourth, on-site cardiopulmonary resuscitation

Section 2 Fire Prevention, Explosion Prevention and Arc Radiation Prevention

A, harmful gases and welding dust

Second, fire and explosion prevention

Third, the arc radiation protection

Section 3 Welding under Special Environment

A, welding in a container

Second, the aerial work welding

Third, open-air or on-site welding.

Four, argon arc welding safety regulations

Chapter III Welding Materials for TIG Welding

The first section welding wire

A, the role and requirements of welding wire

Second, the model and brand of welding wire

Three, the use and storage of welding wire

Section 2 Tungsten electrode

I. Functions and Requirements of Tungsten Electrode

Two. Types, brands and specifications of tungsten electrodes

Third, the current-carrying capacity of tungsten electrode

IV. Geometric shape of tungsten electrode tip

Section III Argon

I. Characteristics of argon gas

Second, the requirements for argon purity

Three, argon bottle

Section 4 Other protective gases

First, helium

Second, argon-hydrogen mixed gas

Third, the choice of protective gas

Chapter IV Argon Arc Welding Equipment

The first section welding machine model and its technical characteristics

A, commonly used argon arc welding machine number compilation method

Second, argon arc welding machine series and its technical characteristics

Three, typical manual argon tungsten arc welding machine

Four, argon arc welding machine installation and connection

Verb (abbreviation of verb) welding machine debugging

Section 2 argon arc welding power supply and control equipment

A, argon arc welding power supply

Second, the arc ignition device

Third, the arc stabilizer.

Fourth, the control system

Section 3 Welding torch and argon flow regulator

I argon arc welding torch

Second, the argon flow regulator

Section 4 Equipment Maintenance and Troubleshooting

I. Maintenance of argon arc welding equipment

Second, the argon arc welding machine common faults and troubleshooting methods

Chapter V Manual TIG Welding Technology

Section 1 Selection of Welding Process Parameters

A, welding current and tungsten electrode diameter

Second, the arc voltage

Third, welding speed.

Four. Type and polarity of welding power supply

Verb (abbreviation for verb) nozzle diameter and argon flow rate

Six, tungsten electrode extension length

Seven. Distance between nozzle and workpiece

Eight, welding wire diameter

Nine, left welding method and right welding method

In the second quarter, the basic operation of manual TIG welding

First, strike the arc.

Second, the positioning weld

Third, positioning welding.

Four, welding and joint

Five, fill the wire

Sixth, the arc is closed.

Section 3 Inspection before and after welding

A, welding machine before welding inspection

Second, the load check

Third, after welding inspection

Chapter VI General Welding Technology of Manual TIG Welding

The first section plate welding

First, flat welding

Second, I-groove butt welding

V-groove butt welding

Four, thin flat angle welding

The second section tubesheet welding

First, preparation before welding

Second, the plug-in tubesheet butt joint

Three, saddle tube plate butt joint

Section 3 Pipeline Docking

First, preparation before welding

Second, the inspection after welding

Third, small-diameter pipeline docking.

Four, large diameter pipeline butt joint

Chapter VII Welding Stress and Deformation

Section 1 Overview

First, the hazards of welding stress and deformation

Second, the causes of welding stress and deformation

Three. Influencing factors of welding stress and deformation

Welding stress in the second quarter

I. Internal stress and welding stress

Second, the adjustment of welding residual stress

Third, the method of eliminating internal stress after welding

The third quarter welding deformation

A, the types of welding deformation

Second, the control and correction of welding deformation

Chapter VIII Common Welding Defects and Preventive Measures

The first section welding quality requirements

First, the requirements of welding quality for overall dimensions

Second, the welding quality requirements for welding zone gas

Section 2 Welding Quality Inspection

A, the process of welding quality inspection

Second, the welding quality inspection method

Section 3 Common Welding Defects and Preventive Measures

First, the weld size does not meet the requirements.

Second, bite the edge

Third, burn through

Fourth, flash.

Verb (verb's abbreviation) with slag.

Six, incomplete penetration

Seven, stomata

Eight, overheating (overheating)

Nine, incomplete integration

Arc pit

XI。 crack

Twelve, the wrong side